iphone GPS tracking, anyone?

[Mr. Bloom]

For kicks, I took the iphone on a 13 mile ride today using iMapMyRide.

It was very accurate relative to the Garmin.

It used 60% of the phone's battery life in 13 miles.

The "Locator" services are apparently real power hogs. Plus I was in a 3G area which uses more power.

Finally, it was in my jacket pocket, so it didn't help much on gauging speed, etc.

I'll only use it as a backup to the Garmin on those rare times where I forget to charge it up...

[OakLeaf]

those rare times where I forget to charge it up...

The Garmin charges just fine from a battery power source. I've charged both the Forerunner and the Edge from my 4-AA battery pack on two-day tours. In a pinch you could do it on-bike from a bento box, if you have one, or even from your jersey pocket with a long USB cable. You could start a new fashion trend...

[HillSlugger]

The Garmin charges just fine from a battery power source. I've charged both the Forerunner and the Edge from my 4-AA battery pack on two-day tours. In a pinch you could do it on-bike from a bento box, if you have one, or even from your jersey pocket with a long USB cable. You could start a new fashion trend...

Which Forerunner do you have? For my 305 I would have to figure out how to attach the Garmin securely to its cradle to be able to use this trick.

[OakLeaf]

yeah, lol, I thought the Edge port would be accessible but it actually isn't now that I look at it. I knew the Forerunner's wouldn't be. Still in a pinch it could be done, just the GPS would have to ride in a pocket or box until it was charged, only an hour or two.